30286820 has 24 divisors (see below), whose sum is σ = 63720384. Its totient is φ = 12092256.

The previous prime is 30286811. The next prime is 30286829. The reversal of 30286820 is 2868203.

It is an interprime number because it is at equal distance from previous prime (30286811) and next prime (30286829).

It is not an unprimeable number, because it can be changed into a prime (30286829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13499 + ... + 15581.

It is an arithmetic number, because the mean of its divisors is an integer number (2655016).

Almost surely, 2^30286820 is an apocalyptic number.

It is an amenable number.

30286820 is an abundant number, since it is smaller than the sum of its proper divisors (33433564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30286820 is a wasteful number, since it uses less digits than its factorization.

30286820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819 (or 2817 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 30286820 is about 5503.3462547799. The cubic root of 30286820 is about 311.7103519397.

The spelling of 30286820 in words is "thirty million, two hundred eighty-six thousand, eight hundred twenty".